tbcs_ppzksnark.hpp

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#ifndef TBCS_PPZKSNARK_HPP_
#define TBCS_PPZKSNARK_HPP_
 
#include <libsnark/relations/circuit_satisfaction_problems/tbcs/tbcs.hpp>
#include <libsnark/zk_proof_systems/ppzksnark/tbcs_ppzksnark/tbcs_ppzksnark_params.hpp>
#include <libsnark/zk_proof_systems/ppzksnark/uscs_ppzksnark/uscs_ppzksnark.hpp>
 
namespace libsnark
{
 
/******************************** Proving key ********************************/
 
template<typename ppT> class tbcs_ppzksnark_proving_key;
 
template<typename ppT>
std::ostream &operator<<(
    std::ostream &out, const tbcs_ppzksnark_proving_key<ppT> &pk);
 
template<typename ppT>
std::istream &operator>>(std::istream &in, tbcs_ppzksnark_proving_key<ppT> &pk);
 
template<typename ppT> class tbcs_ppzksnark_proving_key
{
public:
    typedef libff::Fr<ppT> FieldT;
 
    tbcs_ppzksnark_circuit circuit;
    uscs_ppzksnark_proving_key<ppT> uscs_pk;
 
    tbcs_ppzksnark_proving_key(){};
    tbcs_ppzksnark_proving_key(const tbcs_ppzksnark_proving_key<ppT> &other) =
        default;
    tbcs_ppzksnark_proving_key(tbcs_ppzksnark_proving_key<ppT> &&other) =
        default;
    tbcs_ppzksnark_proving_key(
        const tbcs_ppzksnark_circuit &circuit,
        const uscs_ppzksnark_proving_key<ppT> &uscs_pk)
        : circuit(circuit), uscs_pk(uscs_pk)
    {
    }
    tbcs_ppzksnark_proving_key(
        tbcs_ppzksnark_circuit &&circuit,
        uscs_ppzksnark_proving_key<ppT> &&uscs_pk)
        : circuit(std::move(circuit)), uscs_pk(std::move(uscs_pk))
    {
    }
 
    tbcs_ppzksnark_proving_key<ppT> &operator=(
        const tbcs_ppzksnark_proving_key<ppT> &other) = default;
 
    size_t G1_size() const { return uscs_pk.G1_size(); }
 
    size_t G2_size() const { return uscs_pk.G2_size(); }
 
    size_t G1_sparse_size() const { return uscs_pk.G1_sparse_size(); }
 
    size_t G2_sparse_size() const { return uscs_pk.G2_sparse_size(); }
 
    size_t size_in_bits() const { return uscs_pk.size_in_bits(); }
 
    void print_size() const { uscs_pk.print_size(); }
 
    bool operator==(const tbcs_ppzksnark_proving_key<ppT> &other) const;
    friend std::ostream &operator<<<ppT>(
        std::ostream &out, const tbcs_ppzksnark_proving_key<ppT> &pk);
    friend std::istream &operator>>
        <ppT>(std::istream &in, tbcs_ppzksnark_proving_key<ppT> &pk);
};
 
/******************************* Verification key ****************************/
 
template<typename ppT>
using tbcs_ppzksnark_verification_key = uscs_ppzksnark_verification_key<ppT>;
 
/************************ Processed verification key *************************/
 
template<typename ppT>
using tbcs_ppzksnark_processed_verification_key =
    uscs_ppzksnark_processed_verification_key<ppT>;
 
/********************************** Key pair *********************************/
 
template<typename ppT> class tbcs_ppzksnark_keypair
{
public:
    tbcs_ppzksnark_proving_key<ppT> pk;
    tbcs_ppzksnark_verification_key<ppT> vk;
 
    tbcs_ppzksnark_keypair(){};
    tbcs_ppzksnark_keypair(tbcs_ppzksnark_keypair<ppT> &&other) = default;
    tbcs_ppzksnark_keypair(
        const tbcs_ppzksnark_proving_key<ppT> &pk,
        const tbcs_ppzksnark_verification_key<ppT> &vk)
        : pk(pk), vk(vk)
    {
    }
 
    tbcs_ppzksnark_keypair(
        tbcs_ppzksnark_proving_key<ppT> &&pk,
        tbcs_ppzksnark_verification_key<ppT> &&vk)
        : pk(std::move(pk)), vk(std::move(vk))
    {
    }
};
 
/*********************************** Proof ***********************************/
 
template<typename ppT> using tbcs_ppzksnark_proof = uscs_ppzksnark_proof<ppT>;
 
/***************************** Main algorithms *******************************/
 
template<typename ppT>
tbcs_ppzksnark_keypair<ppT> tbcs_ppzksnark_generator(
    const tbcs_ppzksnark_circuit &circuit);
 
template<typename ppT>
tbcs_ppzksnark_proof<ppT> tbcs_ppzksnark_prover(
    const tbcs_ppzksnark_proving_key<ppT> &pk,
    const tbcs_ppzksnark_primary_input &primary_input,
    const tbcs_ppzksnark_auxiliary_input &auxiliary_input);
 
/*
 Below are four variants of verifier algorithm for the TBCS ppzkSNARK.
 
 These are the four cases that arise from the following two choices:
 
 (1) The verifier accepts a (non-processed) verification key or, instead, a
 processed verification key. In the latter case, we call the algorithm an
 "online verifier".
 
 (2) The verifier checks for "weak" input consistency or, instead, "strong"
 input consistency. Strong input consistency requires that |primary_input| =
 C.num_inputs, whereas weak input consistency requires that |primary_input| <=
 C.num_inputs (and the primary input is implicitly padded with zeros up to
 length C.num_inputs).
 */
 
template<typename ppT>
bool tbcs_ppzksnark_verifier_weak_IC(
    const tbcs_ppzksnark_verification_key<ppT> &vk,
    const tbcs_ppzksnark_primary_input &primary_input,
    const tbcs_ppzksnark_proof<ppT> &proof);
 
template<typename ppT>
bool tbcs_ppzksnark_verifier_strong_IC(
    const tbcs_ppzksnark_verification_key<ppT> &vk,
    const tbcs_ppzksnark_primary_input &primary_input,
    const tbcs_ppzksnark_proof<ppT> &proof);
 
template<typename ppT>
tbcs_ppzksnark_processed_verification_key<ppT> tbcs_ppzksnark_verifier_process_vk(
    const tbcs_ppzksnark_verification_key<ppT> &vk);
 
template<typename ppT>
bool tbcs_ppzksnark_online_verifier_weak_IC(
    const tbcs_ppzksnark_processed_verification_key<ppT> &pvk,
    const tbcs_ppzksnark_primary_input &primary_input,
    const tbcs_ppzksnark_proof<ppT> &proof);
 
template<typename ppT>
bool tbcs_ppzksnark_online_verifier_strong_IC(
    const tbcs_ppzksnark_processed_verification_key<ppT> &pvk,
    const tbcs_ppzksnark_primary_input &primary_input,
    const tbcs_ppzksnark_proof<ppT> &proof);
 
} // namespace libsnark
 
#include <libsnark/zk_proof_systems/ppzksnark/tbcs_ppzksnark/tbcs_ppzksnark.tcc>
 
#endif // TBCS_PPZKSNARK_HPP_